Beef Wellington - SavvyMom

Ingredients

• 2 lb (.907 kg) beef tenderloin
• Kosher salt
• Freshly ground pepper
• 2 tsp vegetable oil
• 1 small onion, chopped
• 2 cups mushrooms, finely chopped
• ¼ cup dry red wine (optional)
• 4 oz (115g) chicken or goose liver pate, room temperature
• 1 lb package frozen puff pastry, thawed (refrigerate until ready to use)
• 1 large egg, lightly beaten
• All purpose flour, for rolling pastry